3-spring design to provide easy activation of suctionAnti-reflux valve in reservoir which helps prevent backflow of fluid to the patient. Transparent sidewall with clearly marked graduations for quick and easy identification and measurement of exudate. Not made with natural rubber latex. The PVC wound drain includes a radiopaque stripe for x-ray detection. Universal wound drain y-connector which can be cut to accept 3/32 in., 1/8 in., 3/16 in. or 1/4 in. diameter wound drains. All kits include a round, center perforated, hubless PVC drain witha trocar.